Emergent Universal Drag Law in a Model of Superflow

Autor:	Christenhusz, M. T. M., Safavi-Naini, A., Rubinsztein-Dunlop, H., Neely, T. W., Reeves, M. T.
Rok vydání:	2024
Předmět:	Condensed Matter - Quantum Gases Physics - Fluid Dynamics
Druh dokumentu:	Working Paper
Popis:	Despite the fundamentally different dissipation mechanisms, many laws and phenomena of classical turbulence equivalently manifest in quantum turbulence. The Reynolds law of dynamical similarity states that two objects of same geometry across different length scales are hydrodynamically equivalent under the same Reynolds number, leading to a universal drag coefficient law. In this work we confirm the existence of a universal drag law in a superfluid wake, facilitated by the nucleation of quantized vortices. We numerically study superfluid flow across a range of Reynolds numbers for the paradigmatic classical hard-wall and the Gaussian obstacle, popular in experimental quantum hydrodynamics. In addition, we provide a feasible method for measuring superfluid drag forces in an experimental environment using control volumes. Comment: 6+2 pages, 3+2 figures, 1 table
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2406.14049 Zobrazit plný text záznamu View this record from Arxiv